3.3.2显示学生成绩记录display_record()

具体实现如下：

void stuscore::display_record() {

student*current; current=head;

cout<<"表中有"<<length()<<"条记录!\n"; if(length()) {

cout<<setiosflags(ios::left)<<setw(15)<<"学号"<<setw(15)<<"姓名"<<setw(12)<<"性别"<<setw(5)<<"成绩"<<endl; while(current) {

cout<<current; current=current->next; } } }

另外，对<<运算符进行了重载，这样就可以直接用cout输出学生成绩记录，函数重载如下： ostream&operator<<(ostream&output,const student *addr) {

output<<setiosflags(ios::left)<<setw(15)<<addr->number<<setw(15)<<addr->name<<setw(12)<<addr->sex<<setw(5)<<addr->chengji<<endl; }

return output;

3.3.3查找学生成绩记录find_record()

具体实现如下：

bool stuscore::find_record() {

student *current,*previous;